Selling a Duncan Coldfusion

[sliknik]

I am selling a Duncan Cold Fusion on ebay in the UK

am getting a lot of offers that are very low - what should i hold out for?

link is

http://www.ebay.co.uk/itm/Duncan-Cold-Fusion-YoYo-Red-Black-very-rare-/130697117961?pt=UK_Toys_Creative_Educational_RL&hash=item1e6e27c109

thanks